Recently, she took to Instagram to share something that's helped her get this far in her journey: pushing herself out of her comfort zone. To elaborate, she shared a video of herself boxing, saying, "My gym offers a boxing class and it took me forever to try it out. Now...better watch out." (Related: Why Jen Widerstrom Thinks You Should Say Yes to Something You'd Never Do)

Adan couldn't be more right. There are serious benefits to tackling something totally new and scary—whether it's a new workout you've always wanted to try or heading to the gym for the first time in months or years. For starters, there are so many mind-body benefits of trying something new. Plus, the more new things you try to conquer, the more capable, confident, and badass you'll feel. And who doesn't want to feel like a badass?

If you rise to the challenge, "every day you will get stronger," says Adan. "Every day your body will be able to do new things you never thought you could do. Every day you keep loving yourself, pushing yourself and doing what best for you...that's when the strength inside of you grows and your inner confidence will shine through."

So as you head into the New Year thinking about your goals and resolutions, remember this: "It's never about what you can't do, it's always about what you can do," writes Adan. "So get out there, kick some butt and know that you are so much stronger than you think you are."